Lewmar MAMBA auto pilot drive clutch

[DeValency]

Quite unexpectedly my Mamba rotary drive (1/4" HP) clutch stopped engaging the motor with the assembly gearbox. The clutch is getting the 12V power when the auto pilot is turned to Auto and I can hear the motor running, trying to do the job, but the steering shaft isn't moving. The boat has a solid drive shaft steering all the way from the helm through the AP drive gear to the tiller shaft mechanism.

After quite few requests, got the Mamba drive blue prints from Lewmar and the parts list, it gives me a general idea on the assembly.

I wonder if anyone replaced (or repaired) the clutch of this assembly and if yes, if you can provide some hints on the procedure.

Hope the pictures can show this installation well enough.

Thanks!

[ameliaalex]

I am looking at an Island Packet with the Lewmar Mamba Drive system. How did you make out with the clutch? How do you find the Mamba drive system overall?

Regards,

Graham

[DeValency]

I was unable to dismantle the drive and reach the clutch and as the drive was already 20 years old, Lewmar offered me a special discount for a complete new drive, which I accepted.

Overall, this is the best electrical drive for a shaft driven steering system, like I have (no cables, no quadrant, just a set of heavy duty gears as my rudder is quite huge. It worked perfectly well for all the years. Hydraulic drive may have some advantages, but basically more complicated if you really want a robust and reliable one.

Island Packet know what they're doing in quality boat building and design, so should work well for you.
Best of luck!